Growing medium

The grit on top is very important. It stops the surface drying, it prevents
rain from compacting the surface, it prevents rain splashing the seeds, it
holds surface sown seeds in place so that the radical does not push the
seed away from the compost.
There are different grades of sand, soft sand used for fine cement and fine
brickwork is no good. Coarse sand (also called washed or gritty sand) used
for concrete mixes is a perfectly reasonable ingredient, I have grown
Dionysias, Trilliums and Haemanthus in it, along with many other genera,
(Including from seed).
On Tue, Jul 10, 2012 at 7:11 PM, Sujit Hart <sujithart@gmail.com> wrote:
> What is the importance of putting a thin layer of coarse grit? I see that
> im many of the photos posted.
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